<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
    <button id="clickMe">click</button>
    <script>
        let clickMe = document.querySelector('#clickMe');
        clickMe.addEventListener('click', function () {
            clickMe.innerHTML = 'clicked';
        });
        setTimeout(function () {
            clickMe.click();
        }, 3000);
    </script>
</body>

</html>